Furnace for treating ores.



J. A. FRBY. FURNACE FOR TREATING ORES.

APPLIOATION FILED AUG. 23, 1913.

Patented Dec. 16, 1913.

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3 SHEETSSHEET 1.

5 Ill/l/E/VTOR [0/2/2 By 744 m/v v WITNESSES J. A. FRBY.

FURNACE FOR TREATING ORES.

APPLICATION FILED AUG. 23, 1913.

Patented D60. 16, 1918.

' 'l/W/EA/TOR L/Z/Z Z BY htmwr ATTORNEYS 3 SHEETS-SHEET Z.

WITNESSES 6 W J. A. PREY.

FURNACE FOR TREATING ORBS.

APPLICATION FILED AUG. 23, 1913.

Patented Dec. 16, 1913.

3 S-HEETSSHEET 3.

WITNESSES ATTORNEYS Eliseo issa OHN'LA. FREY, 0F SILVER SPRING,MARYLAND.

FURNACE FOR TREATING ORES.

lull-(31,732..

Specification of Letters Patent.

Patented Dec. 1191.3.

Applicationfiled August 23, 1913. Serial No. 786,284.

To all 10710122. 2'75 may concern Be it known that 1, JOHN A. FREY, acitizen of the United States, and a resident of Silver Spring, in thecounty of Montgomery and State of ll'ftarylaud, have made certain newand useful Improvements in Furnaces for Treating Ores, of which thefollowing is a specification.

An object of my invention is to provide a device by means of which oressuch as those containing sulfur, arsenic, and the like may be treated inorder to bring them into a state from which the valuable metals may bereadily extracted. I

A further object of my invention is to provide a novel form of furnacein which steam is passed into the furnace underhigh temperature andpressure in order to aid in the treatment of the ores.

A further object of my invention is to provide a novel form of furnacewhich may be readily assembled or dismantled.

A further object of my invention is to provide a furnace of the typedescribed with novel means for charging and discharging the furnace.

Other objects and advantages will appear in the following specificationand the novel features of the device will be particularly pointed out inth 1, appended claims.

My invention is illustrated in the accompanying drawings forming part ofthis application in whieh- Figure 1 is a vertical section through thefurnace, Fig. 1 is a detail face view of a pressure gage, F 2 is an endview of the furnace, Fig. 3 is a section along the line 33 of Fig. 1,Fig. 4 is a section along the line 4 1 of Fig. 2, Fig. 5 is aperspective view of a portion of a modified form of the device, Fig. 6is a detail perspective view of the inner portions of part of the framework or casing, and Figs; 7, 8, and 9 are detail perspective views ofthe casing and supporting frame work therefor.

In carrying out my invention 1 provide a suitable foundation 1 uponwhich is mounted the base 2 of the furnace. The base contains thecombustion chamber 3 to which "access is had by means of the door 4.

Above the base portion 2 is a casing portion preferably of rectangularshape and made of metal or other suitable material as shown at 5.Secured at the ends of the member 5 and resting upon the base 2 arelatter, as will be seen from Fig. 9, are provided with anti-frictionrollers S, which are i set in sockets in the frames 6. The frames 6 andthe upper end of the member 5 are provided with alincd grooves S" forreceiving the hollow shafts 9 and 10 respectively. These hollow shafts,as will be seen from Fig. 1. form extensions of integral heads 9 and 10respectively. A cylindrical member 1.1 is secured at its ends to theheads 9 and 10. thus forming the main roasting chamber. Longitudinalbars or brace members 12 are secured to the headsand pass through theroasting chamber. Certain of these rods 12 may be provided with sleeves12 which fit over the rods and to-which are secured a series of blades12". these blades being parallel with each other, but the plane of theblades being at an angle to the axis of the rods 12. On the interior ofthe roasting chamber is a shield or deflector 13 whose purpose will beexplained later.

eecured to the tops of the frame member 6 are the uprights 14- to whichis secured a central cross member 15 having a central opening 15surrounded by a flange or collar 16. The latter forms a retaining memberfor the stack 17. The members 11 and 15 are braced on their under sidesby means of the braces or flanges 1 1- and 15, as shown in Fig. (SJ Theupper part of the casing consists of two members 18 and 19 which aresubstantially in the form of niartcr cylinders, as will be seen from thedrawings. The member 18 is provided with a door 18 at one end. hebottoms of the members 18 and 19 are provided with outwardly turnedflanges 18 and 19 respectively arranged to rest upon the inturnedflanges 5 of the member 5. These quarter cylindrical casing members maybe secured to. the um-ight frame members 14 by means of hooh -20 or inany other suitable manner. will be seen from Fig.8 certain of theoutwardly turned flanges 18? and 19 abut the brace members 14* of theupright frame members lat, While other flanges abut the brace members 15of the upper frame member 15. The upper easing member 10 is providedwith an opening which may be closed by a closure 21, and which may beused as a peep hole to view the interior of the device.

proper is provided with an opening 9 her or casing The head :9 of theroasting cham(ber see Fig. 4). Around this opening is a frame 9 which iscountersunk as shown at 9 and which is provided with a shoulder arrangedto receive the closure 9. vided with a rim 9 arranged to engage theshoulder on the frame. The closure 9 may be held in place by means of ascrew 9 which passes through a plate or bar 9. The ends of the latterare bentas shown at 9 to engage flanges 9 of the plate 9. It will beseenthat by the closure 9? may be held securely in position and that onthe release of the screw 9 the bar 9*} may be slipped out of its place,thereby permitting the closure 9" to be removed.

The crushed or p0 dered ore is normally held in a bin 23 from whichleads a chute 24. having a telescopic extension25 which may be .movedoutwardly by means .of a chain 26. .On one end of the hollow shaft 9 isa driving gear 27. An extension of the shaft 9 is shown at 28. -This isprovided with a valve 29.

Communicating with the hollow shaft 10 on the opposite end of the deviceis a pipe 30 havingopenings 31 leading into a cham- 32. Communicatingwith the latter is apressure gage 33. At one end of the pipe 30 is a cap34.,having a swiveled hollow nipple-3-5 to which a pipe 36 maybeattached, the purpose of this arrangement being to'permit the attachmentof the pipe to the end of the pipe 30 so as to permit the revolution ofthe latter while the pipe 36 is stationary. Through this pipe 36 I mayintroduce chemicals under pressure for the purpose of aiding in thetreatment of the ores.

Mounted upon a suitable foundation 37 is a heater 38 having inside of ita coil 39 which communicates at one end by means of a pipe 40 with thechamber 32 and at the other end with an inlet pipe llwhich is providedwith a valve l2. A branch pipe 43 also communicates with the coil 39 andmay be provided with a valve (not shown).

From the foregoing description of the various parts of the device theoperation thereof may be readily understobd.

The roasting chamber is revolved until the closure. 9 comes opposite thedoor 18*. The latter is swung open and the closure is removed in themanner already described and the extension 25 of the pipe at is run inas shown by dotted lines in Fig. 1. The

finely ground ore is now permitted to pass.

ore has been placed within the chamber, thegate is shut off and thetelescopic portion. of the pipe '25 is withdrawn and the closure 9* isreplaped. The roastingchamber is sub- The latter is proturning the screw9? jected to a preliminary heating by placing fuel in the combustionchamber 3. It will be understood that this fuel may be either liquid orsolid fuel as conditions arrant. Steam is passed in through the pipe 41by opening'the valve 42. The steam is under considerable pressure and ishighly heated in the coils 39 by means of the heater 38.

These coils are heated to redness in order to raise the steam to hightemperature. The steam passes through the pipe 40 and through the pipe30 and hollow shaft 10 into the interior of the roasting chamber.

The latter is turned by power applied to the gear. 27 and the ore iscaught up by shelves or brackets i5 (see Fig. 3) and deposited again onthebottom, thus permitting the steam to have full access to all partsthereof.

The steam tends to increase the temperature within the furnace and byits action greatly facilitates the removal of the sulfur, arsenic, andother constituents of the ores which are designed to be gotten rid of.The shield 13 prevents the blowing of the fine dust particles outthrough the hollow shaft 9, thus eliminating danger of clogging up thelatter. but it will permit the gases containing the deleterioussubstances such as compounds of sulfur and arsenic to pass through thehollow shaft 9. When the pressure rises sufliciently the valve 29 opensand permits theescape of these gases whence they may be subsequentlytreated for recovery of the sulfur 'or arsenic. The latter step howeverforms no part of this inven. tion. An automatic valve (not shown) may besecured to the chamber 32 at 46 (see Fig. 4). so'as to prevent an excessof pressure within the roasting chamber. .l/Vhen the ores have beensufficiently treated the roasting chamber is brought into the positionshown in Fig. 1, the closure 9 is removed and the contents of theroasting chamber may be withdrawn through the chute 47 shown in dottedlines.

The device described above forms a Very efficient means of treatment ofthe ores. The provision of means for heating the steam tends to bringthe latter into condition for mostefiective treatment of the ores. Thecharging of the device and the emptying of the latter takes but littletime, while the closure 9 is held securelywhen once the.

chamber is charged. The outer casing is very easily removed for purposesof repair or inspection by unloosening the hooks20 and sliding thequarter cylindrical casing members 18 and 19 outwardly. The provision ofthe roller bearings 8 reduces the friction while rotating the chamberand adds to the economical working of the device.

It may besometimes desirable to introduce hydrocarbon compounds with thesteam in order to increase the temperature within ing, heads at the endof said casing, a hollow shaft on one side of each of said'heads and theroasting chamber and to this end I provide the pipe 43 which, as statedabove, communicates with the coil 39.

I claim:

1 In a device for treating ores, a roasting chamber. comprising acylindrical casforming an integral portion thereof, an exterior casingfor said roasting chamber, said shafts being journaled in said exteriorcasing, means for introducing steam through one of said hollow shafts,means for permitting the escape of the gaseous products through theother of said shafts, and a de- Hector carried by one of said heads anddisposed over the end of the exhaust passage, saiddeflector being spacedfrom the head to permit the passage of the gaseous products, p v

2. In a furnace for treating ores, a roasting chamber, a casingtherefor, said casing comprising a base portion having bearings, hollowshafts communicating with-the interior of said roasting chamber andbeing journaled on said bearings, and an upper portion comprising twoseparable quarter cylindrical casing members, and means for securingsaid casing members together.

3. In a furnace or roasting ores, a base portion provided with bearings,hollow shafts journaled in said bearings, a head integral with each ofsaid shafts, a cylindrical member secured to said head, said heads andsaid cylindrical member forming a roasting chamber, a casing framemounted upon said base portion, said frame com hollow shafts journaledin said bearin s and said communicating with the interior 0 roastingchamber, an inverted U-shaped frame member secured to said base and being provided vwith a central opening, a stack supported by said invertedU-shaped frame member and communicating'with said central opening, andquarter-cylindrical casing members slidably disposed upon said base andmovable toward and away from said inverted U-shaped frame member.

5. In a furnace for treating ores, a roasting chamber, a casingtherefor, said casing comprising a base portion, an inverted U- shapedframe secured to said base portion, said frame being provided withinwardly projecting flanges, quarter-cylindrical casmembers disposedupon said base and being provided with flanges arranged to abut theinwardly projecting flanges of said inverted U-shaped frame member, andmeans for securing said quarter-cylindrical casing to said invertedU-shaped frame member.

JOHN A. FREY.

" itnesses L. A. STANLEY, SoLoN C. KEMON,

